package cn.iocoder.yudao.module.dbit.captcha;


import cn.iocoder.yudao.framework.common.pojo.CommonResult;
import com.google.code.kaptcha.Producer;
import io.swagger.v3.oas.annotations.Operation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.HashMap;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

@RestController
@RequestMapping("/dbit")
public class CaptchaImageController {
    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Autowired
    private RedisCache redisCache;

    @GetMapping("/captchaImage")
    @Operation(summary = "验证码生成")
    public CommonResult getCode(HttpServletResponse response) throws IOException
    {
        // 保存验证码信息
        String uuid = UUID.randomUUID().toString();
        String verifyKey = DbitConsts.CAPTCHA_CODE_KEY + uuid;

        String capStr = null, code = null;
        BufferedImage image = null;
        // 生成验证码
        String captchaType = DbitConsts.CAPTCHA_CODE_TYPE_MATH;
        if ("math".equals(captchaType))
        {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        }
        else if ("char".equals(captchaType))
        {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }

        redisCache.setCacheObject(verifyKey, code, DbitConsts.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try
        {
            ImageIO.write(image, "jpg", os);
        }
        catch (IOException e)
        {
//            return CommonResult.error(e.getMessage());
        }

        HashMap hm = new HashMap();
        hm.put("uuid", uuid);
        hm.put("codev", code);
        hm.put("img", Base64.encode(os.toByteArray()));
        return CommonResult.success(hm);
    }
}
